The world of HVAC design and building performance is changing fast. With rising expectations around comfort, energy efficiency and carbon reduction, engineers increasingly depend on digital tools to make accurate decisions. But the range of available platforms is broad, and the differences in what they offer can be significant.

To bring clarity, we’ve compiled a balanced, research-based overview of the top 7 HVAC software tools for 2026. These platforms represent a mix of simulation tools, BIM environments, design automation software and operational management systems—each serving a different stage in the HVAC lifecycle.

If you want to explore more detailed comparisons of hydronic modelling tools and design approaches, you can take a look at our comparison hub.

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1. Hysopt

Hysopt is widely recognised for its hydronic modelling capabilities, making it particularly useful for engineers who need to validate and optimise the behaviour of heating and cooling systems. It simulates real-life system dynamics—flow, pressure, temperatures and interactions across components—which helps reduce oversizing and prevents hidden inefficiencies.

Engineers often use Hysopt for renovations, masterplanning, decarbonisation pathways and large tertiary buildings where system performance is crucial.

More information is available here ›

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2. Trane Trace 3D Plus

Trace 3D Plus by Trane is a respected tool for load calculations and early energy modelling. It is often used in concept design and compliance-driven workflows. The 3D interface helps visualise building geometry, and its ASHRAE-based calculation engine supports accurate thermal simulations.

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3. Carrier HAP

Carrier HAP remains one of the most commonly used tools in consulting offices. It offers hourly load calculations and building energy analysis, making it suitable for selecting HVAC systems and estimating annual performance. Its straightforward workflow appeals to users who need dependable results without steep learning curves.

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4. Daikin D-Tools

Daikin’s D-Tools platform is geared toward VRV/VRF system design, helping engineers with automatic equipment selection, pipe sizing and layout validation. While it is largely brand-specific, it’s a powerful tool for projects where heat pumps and variable refrigerant solutions play a central role.

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5. Revit with MEP functionality

Revit remains the central BIM tool in the industry. Its MEP environment enables coordinated modelling of pipes, ducts, plantrooms and equipment. Although HVAC calculations in Revit are limited, its value lies in documentation, coordination, and clash detection. For performance simulations, engineers typically connect Revit with specialist tools like Hysopt, HAP or Trace.

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6. EnergyPlus and OpenStudio

EnergyPlus combined with OpenStudio is ideal for advanced energy simulation. It offers granular control over loads, HVAC components, schedules and building physics. Despite being open-source, it is incredibly powerful—though more technical than most commercial tools. It’s commonly used in research, policy modelling and academic environments.

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7. Siemens Desigo CC

Desigo CC isn’t a design tool but an operational building management platform. It is used to monitor, control and optimise HVAC systems in real buildings. For facilities teams managing hospitals, campuses or commercial portfolios, it provides valuable insights into performance, maintenance needs and energy use.

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How to choose the right HVAC software

Each platform serves a different purpose:

For hydronic performance validation: Hysopt offers detailed simulation that helps reduce energy waste and improve system reliability.
For early-stage load analysis: Trace 3D Plus and HAP are strong, established options.
For VRF/VRV systems: D-Tools is designed specifically for this purpose.
For BIM coordination: Revit remains essential across disciplines.
For energy simulation: EnergyPlus provides unparalleled flexibility.
For long-term system operation: Desigo CC supports portfolio-wide HVAC optimisation.

If you’re exploring feasibility questions around HVAC design or refurbishment, this page offers a good starting point ›

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FAQ: Top HVAC Software

What is the best HVAC software?

The best HVAC software depends on your needs. Some tools focus on load calculations, others on BIM coordination, and some specialise in hydronic modelling for more detailed performance insight.

What does HVAC engineering software do?

HVAC modelling software predicts how heating and cooling systems will behave in real conditions. It helps engineers make more accurate decisions by testing system performance before installation.

Who uses HVAC software?

HVAC software is used by engineers, designers, consultants and facility teams who want greater certainty about system performance, energy use and long-term reliability.

Explore next steps in HVAC feasibility and modelling

If you're investigating whether a project can meet energy, comfort or decarbonisation goals, hydronic modelling can provide early performance clarity.

Learn more about the Hysopt software ›

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Top 7 HVAC Software for 2026